AUTOKAY Rear Frame Leaf Spring Bump Stops for Silverado & Sierra (pair) — Direct-Fit Rubber, OEM Replace 15712438/523-049

A pair of AUTOKAY rear frame leaf spring bump stops (replace part numbers 15712438 and 523-049) designed to restore rear axle cushioning on select Chevrolet Silverado and GMC Sierra trucks.

These replacement rubber bumpers sit between the rear axle and frame to limit travel and absorb impact when the suspension bottoms out. Made as a direct-fit aftermarket option, the set includes two rear axle rubber bumpers and matches the OEM mounting locations for late‑1990s to mid‑2000s Silverado and Sierra models listed below. If your truck exhibits harsh bottoming, frame contact noises, or visible bumper wear, installing fresh bump stops can revive ride control and protect suspension components.

Which Chevrolet and GMC models do these bump stops fit?

These AUTOKAY bump stops are engineered to fit a range of Silverado and Sierra 1500 and 1500 HD models across model years where the factory part numbers align. Compatibility covers standard and "Classic" body styles for both Chevrolet and GMC for the years shown. Always verify part numbers and year/model before ordering.

• Chevrolet Silverado 1500: 1999–2006; Classic 2007
• Chevrolet Silverado 1500 HD: 2001–2003, 2005–2006; HD Classic 2007
• GMC Sierra 1500: 1999–2006; Classic 2007
• GMC Sierra 1500 HD: 2001–2003, 2005–2006; HD Classic 2007

How do I confirm these replace my OEM part?

Compare your current bumper to the listed replacement numbers (15712438, 523-049) and check its mounting orientation under the rear frame. Visual matching of size, shape and bolt pattern is the fastest check; service manuals or dealer parts diagrams can confirm exact cross-references. When in doubt, remove the old bumper and compare dimensions directly to ensure a correct swap.

• Match existing part numbers: 15712438 or 523-049
• Verify mounting location under rear axle/frame
• Compare shape and dimensions to the new rubber bumper

What are the practical benefits of replacing worn bump stops?

Fresh bump stops reduce metal‑to‑metal contact at full suspension compression, which protects frame and axle components and reduces noisy bottoming. They help maintain more consistent suspension feel when hauling or encountering big bumps, and can extend the life of leaf springs and mounts. While not a substitute for damaged springs, they complement a healthy suspension system.

• Absorbs shock at full compression to minimize frame stress
• Reduces impact noise and harshness during heavy loads
• Helps protect leaf springs and mounting hardware from hard stops

How difficult is installation and what comes in the package?

Installation is straightforward for anyone comfortable working under a truck: the bump stops typically press or bolt into the factory location on the rear frame. Basic hand tools and a jack to support the axle may be all that’s required; some models may need the old bumper pried out. The package includes one pair of rear axle rubber bumpers to replace both sides.

• Package includes: 1 pair of rear axle rubber bumpers
• Simple press-fit or bolt-in installation in most cases
• Recommended: jack support and common hand tools

Who is this for: Truck owners and independent mechanics who need an affordable, direct-fit replacement for worn rear frame bump stops on compatible Chevrolet Silverado and GMC Sierra 1500/1500 HD models. Choose AUTOKAY 15712438 / 523-049 when you want a like-for-like rubber bumper set to restore rear suspension cushioning and protect underframe components.